Setting up a PXE install using a Linux distro ISO

On my home LAN, I have * A router/switch which is also a DHCP server * A desktop * A (really really old) laptop, which won't even boot from USB I want to use PXE to install a (32-bit) Linux distro on that laptop. I have two problems (that I know of): 1. The pages I see discuss doing this (e.g. this question here on the site) all say I need to setup a DHCP server on my machine... which is fine, except that there's already that other DHCP server. Won't the laptop prefer the other server? 2. Will any bootable 32-bit ISO work? 3. How do I know which files from the distro's mounted ISO to copy where? Note: To be more specific, I'll try to install Linux Lite .